1
2
: any of several virus diseases marked especially by respiratory or intestinal symptoms
Examples of flu in a Sentence
He came down with a bad bout of the flu.
Recent Examples on the Web
Officials initially worried that avian flu was to blame, but tests conducted on ailing birds by the state and by rescue groups have largely been negative.
—
Karen Kucher, San Diego Union-Tribune, 16 Apr. 2026
At American Family Care alone, our network of more than 400 walk-in clinics across the United States has delivered more than six million visits since January 2025 for a wide range of needs, from occupational medicine and pain management to physicals, flu, minor episodic issues and small injuries.
—Jeremy Morgan, Fortune, 16 Apr. 2026
Sanchez claimed pausing the campaign was correlated with increases in preventable deaths, specifically among unvaccinated children who died from the flu.
—Arthur Jones Ii, ABC News, 16 Apr. 2026
In many cases, valley fever symptoms can mirror the flu or COVID, leading doctors to misdiagnose patients, and to not provide proper treatment.
—Tony Briscoe, Los Angeles Times, 16 Apr. 2026
See All Example Sentences for flu
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Karen Kucher, San Diego Union-Tribune, 16 Apr. 2026
At American Family Care alone, our network of more than 400 walk-in clinics across the United States has delivered more than six million visits since January 2025 for a wide range of needs, from occupational medicine and pain management to physicals, flu, minor episodic issues and small injuries.
—Jeremy Morgan, Fortune, 16 Apr. 2026
Sanchez claimed pausing the campaign was correlated with increases in preventable deaths, specifically among unvaccinated children who died from the flu.
—Arthur Jones Ii, ABC News, 16 Apr. 2026
In many cases, valley fever symptoms can mirror the flu or COVID, leading doctors to misdiagnose patients, and to not provide proper treatment.
—Tony Briscoe, Los Angeles Times, 16 Apr. 2026
See All Example Sentences for flu
Cite this Entry
“Flu.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flu. Accessed 20 Apr. 2026.
Copy CitationKids Definition
flu
noun2
: any of several virus diseases that are something like a cold
flu-like
adjective
ˈflü-ˌlīk
Medical Definition
flu
noun1
2
: any of several chiefly viral illnesses marked especially by respiratory or gastrointestinal symptoms see intestinal flu
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